eme groups come together, hemoglobin is formed. Hemoglobin goes through all four steps and it is known to take on the quaternary structure, the most complex of the structures.
             The primary structure in the construction of a protein is the linking of amino acids into polypeptide chains. See Figure 4 for the primary structure of hemoglobin. The hemoglobin molecule is made up of four polypeptide chains, Alpha 1, Beta 1, Alpha 2, and Beta 2, noncovalently constrained to each other. It is essential to realize that Alpha and Beta refers to the two types of chains rather than their secondary structure. In fact, both types of polypeptide chains are in the form of alpha helix. Both the Alpha 1 chain and the Alpha 2 chain are matching and they each contain 141 amino acids. A change in even one of these amino acids affects the whole protein greatly. Furthermore, any change in the primary, secondary, tertiary, or quaternary structure, could change the whole structure, and as a result the whole function of the protein
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